If you wish to use the sentence you submitted, I would punctuate it like this:

“I will go to the mall, provided, however, I will be given money to spend. Provided is a conjunction linking the main thought to the subordinate one. A semicolon usually links thoughts of equal value, so the comma is better.

But let’s look at the sentence further. Provided means “on the condition that.” However means “on the other hand.” Analytically speaking, these two words seem to cancel each other out. So ultimately, were I using this sentence, I would write or say “I will go to the mall, provided I will be given money to spend.”